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by: Tim Clacy |
last post by:
Be a hero and show me a good model of a hardware device register :-O
This might seem like an absurd challenge; after all, the C++ language has
been around for donkeys years now. It's a mature language and we have
powerful design patterns to simplify complex problems. However, I've never
seen, and have never been able to produce, a satisfactory model of a
register! It's not that I'm thick nor inexperienced; I just expect a lot :-)
...
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by: jacob navia |
last post by:
As far as I understood the standard, non-automatic variables
(static/global data) can't be cached in registers because in a
multiprocessing or multi-threading environment, another
thread/processor could read a wrong value from main
memory, if the compiler would do so
Even if the variable has local scope (static variable enclosed
in a function scope) this would still hold since another
processor/thread could run the same code at the same...
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by: aruna |
last post by:
What is the disadvantage of using register
storage class specifier?
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by: Jackie |
last post by:
Hi everyone,
Does anyone know when "register" declarations should be used and when
"register" must not be used? If possible please give examples for both
cases.
Thanks
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by: alakesh.haloi |
last post by:
Hi All
Is there a limit on the number of register variables that can be
declared and initialized in a C program on a particular hardware
platform? If you define more number of register variables than the
processor has, how is it handled by the C compiler?
regards
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by: orium69 |
last post by:
hi everyone, i'm wondering if there is a way to have sure that a
variable is allocated in the cache, after its declaration with
"register"? Tks!
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by: Snis Pilbor |
last post by:
With the "as if" rule in play, doesn't that effectively render the
"register" keyword completely useless?
Example: I make a silly compiler which creates code that goes out of
its way to take a full 10 minutes every time a "register" declared
variable is read from or written to. Besides this lag, everything else
runs as expected. Then my compiler is still C compliant, aye?
If so, then it is unwise for any programmer to ever use the...
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by: sowmiyakc18 |
last post by:
Please clear my doubt. When do we declare a variable to be a register
variable? What are the conditions to be adhered to when register
variables are passed between functions?
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by: antoine |
last post by:
Hi all! I'm a French student currently doing an internship in Beijing. I have to simulate a mips machine running with the micro kernel l4. When i compile the kernel i got some compilation errors. I solved most of them but here I'm stuck and I hope you could help me.
Here is the error message :
/home/antoine/Final/pistachio/kernel/src/api/v4/exregs.cc:233:2: warning: #warning VU: do we have to preserve prios on ex-regs?...
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by: Vashna |
last post by:
Hi Group,
I have a doubt about register variables.
I know that if we have a variable used very frequently in a function,
then provided we never apply the & function to it, we can define it as a
register variable and this will make it much faster to access.
Now the question is: obviously there are only a fixed number of
registers in our CPU, maybe 6 or something. So how do we choose which
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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